55782099 has 12 divisors (see below), whose sum is σ = 82539912. Its totient is φ = 36280800.

The previous prime is 55782071. The next prime is 55782127. The reversal of 55782099 is 99028755.

It is a happy number.

55782099 is a `hidden beast` number, since 557 + 8 + 2 + 0 + 99 = 666.

It is an interprime number because it is at equal distance from previous prime (55782071) and next prime (55782127).

It is not a de Polignac number, because 55782099 - 2²³ = 47393491 is a prime.

It is a super-2 number, since 2×55782099² = 6223285137691602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55782029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75217 + ... + 75954.

It is an arithmetic number, because the mean of its divisors is an integer number (6878326).

Almost surely, 2^55782099 is an apocalyptic number.

55782099 is a deficient number, since it is larger than the sum of its proper divisors (26757813).

55782099 is a wasteful number, since it uses less digits than its factorization.

55782099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151218 (or 151215 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The square root of 55782099 is about 7468.7414602462. The cubic root of 55782099 is about 382.0893658047.

The spelling of 55782099 in words is "fifty-five million, seven hundred eighty-two thousand, ninety-nine".